episode one prologue. explains that two deities that were princess sisters rule over the land of equestira. I may be wrong however. But what truly defines a god? Ares was a god, and all he did was kill people. Two immortal beings with powers over the sun and the moon, and physically rule over the world would fall under my categorization of a god anyways. Not to mention powerful magic and being the only beings left alive aside from discord with knowledge of the art of warfare.